6.1 Vectors and scalars

Question 1

Define vector

Answer 1

a physical quantity with magnitude and direction

Question 2

Define scalar

Answer 2

a physical quantity with magnitude only

Question 3

Give examples for both scalar and vector quantities

Answer 3

scalar: mass, density, volume, energy

Vector: displacement, velocity, force, acceleration

Question 4

What is the resultant force of 2 vectors going in the same direction; going in opposite directions?

Answer 4

same= sum of the 2 vectors

opposite= difference between 2 vectors

Question 5

How do you calculate the resultant force of 2 perpendicular components?

Answer 5

Fcosθ for comportment parallel to a line at angle θ o the line of action of force

Fsinθ for component perpendicular to line